Looking at the more recent, last couple years, posts in the forum, I see two different recommendations for Injectors for the same applications
Bosch 0280155784 23 lb/hr
or
Bosch 0280158051 34.5 lb/h (62647) (with adapter)
23 vs 34.5 seem quite different, so what am I to think?
Injectors for 300 ish HP 99-04 ?
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Cheromaniac
- I live here

- Posts: 3290
- Joined: March 8th, 2008, 12:58 pm
- Stroker Displacement: 4563cc
- Vehicle Year: 1992
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Cyprus
Re: Injectors for 300 ish HP 99-04 ?
What are the build specs of your stroker?
Do you have other external bolt on performance upgrades?
Do you have other external bolt on performance upgrades?
1992 XJ 4.6 I6 Stroker - 5MT - 200rwhp 258rwtq - Sold
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Drooque
- Noob

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- Joined: March 6th, 2022, 1:33 pm
Re: Injectors for 300 ish HP 99-04 ?
The build I personally would be interested in would be almost identical to the 'medium-buck' recipe, in a 2000 Grand Cherokee. For the sake of knowledge, I am more interested in the general 300HP case, than a specific build. So let's say the exact 'medium-buck' recipe, 99-2004, at sea level, proper tune, adequate exhaust, everything working properly, properly built (example: widening the intake opening to match the TB).
What would be the correct injector?
For myself I have built a spreadsheet of parts complete with source and cost. My 4.0l runs strong but has a rod knock. I am waiting to hear back about it's condition, as well as that of rods and 258 crank, before I make final decision on a couple components, primarily pistons. As soon as I do, I will start a new thread about my build.
Thank You
What would be the correct injector?
For myself I have built a spreadsheet of parts complete with source and cost. My 4.0l runs strong but has a rod knock. I am waiting to hear back about it's condition, as well as that of rods and 258 crank, before I make final decision on a couple components, primarily pistons. As soon as I do, I will start a new thread about my build.
Thank You
-
Cheromaniac
- I live here

- Posts: 3290
- Joined: March 8th, 2008, 12:58 pm
- Stroker Displacement: 4563cc
- Vehicle Year: 1992
- Vehicle Make: Jeep
- Vehicle Model: Cherokee
- Location: Cyprus
Re: Injectors for 300 ish HP 99-04 ?
4.7L medium-buck stroker
Jeep 4.2L 3.895" stroke crank
Jeep 4.0L 6.125" rods
Custom forged +0.060" bore pistons, compression height 1.380", dish volume 15cc
10.2:1 CR
CompCams 68-235-4 210/218 degree camshaft
Russ Pottenger ported Edelbrock 60cc aluminum cylinder head
Mopar/Victor 0.043" head gasket
0.043" quench height
Flometrics F&B 68mm billet TB
Bosch 0280155784 injectors for '96-'04 engines
290hp @ 5100rpm, 340lbft @ 3700rpm
Jeep 4.2L 3.895" stroke crank
Jeep 4.0L 6.125" rods
Custom forged +0.060" bore pistons, compression height 1.380", dish volume 15cc
10.2:1 CR
CompCams 68-235-4 210/218 degree camshaft
Russ Pottenger ported Edelbrock 60cc aluminum cylinder head
Mopar/Victor 0.043" head gasket
0.043" quench height
Flometrics F&B 68mm billet TB
Bosch 0280155784 injectors for '96-'04 engines
290hp @ 5100rpm, 340lbft @ 3700rpm